Portion of a mop handle



FIG. 1 is a front right perspective view of a portion of a mop handle showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The dash-dot-dash broken lines immediately adjacent to the shaded areas represent unclaimed boundaries of the claimed design. The dotted broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a portion of a mop handle, as shown and described. 